(switched to email. Please respond via emailed reply-to-all, not via the bugzilla web interface). On Mon, 25 Jul 2011 00:05:48 GMT bugzilla-daemon@xxxxxxxxxxxxxxxxxxx wrote: > https://bugzilla.kernel.org/show_bug.cgi?id=39952 > > Summary: LG VL600 4G USB modem broken in 2.6.39 > Product: Drivers > Version: 2.5 > Kernel Version: 2.6.39 > Platform: All > OS/Version: Linux > Tree: Mainline > Status: NEW > Severity: normal > Priority: P1 > Component: USB > AssignedTo: greg@xxxxxxxxx > ReportedBy: prox@xxxxxxxxxxxxx > Regression: Yes > > > Hi - > > It appears that upon inclusion into 2.6.39 mainline, the driver for the LG > VL600 has stopped working. The original patch for 2.6.38 can be obtained > below: > > https://github.com/balrog-kun/LG-VL600-utils/blob/master/lg-vl600-linux-2.6.38.patch > > When patched against 2.6.38, this modem works as expected on Verizon's LTE > network in the USA. However, ever since it was included in 2.6.39 mainline, it > does not work correctly. The interface comes up correctly, but no traffic > passes through the interface, including DHCP request packets. This has been > reproduced on both i386 and x86-64. > > After looking into this, I managed to make it work again by doing the > following: > > --- linux-2.6.39-orig/drivers/net/usb/cdc_ether.c 2011-07-24 19:48:36.000000000 > -0400 > +++ linux-2.6.39/drivers/net/usb/cdc_ether.c 2011-07-24 19:49:27.000000000 > -0400 > @@ -567,7 +567,7 @@ > { > USB_DEVICE_AND_INTERFACE_INFO(0x1004, 0x61aa, USB_CLASS_COMM, > USB_CDC_SUBCLASS_ETHERNET, USB_CDC_PROTO_NONE), > - .driver_info = (unsigned long)&wwan_info, > + .driver_info = 0, > }, > > /* > > Apparently with wwan_info being set, the lg-vl600 driver was no longer being > registered correctly, and the modem is seen as a generic cdc_ether device: > > [ 19.462567] usb 1-1: Product: LG UDC-AHB Subsystem > [ 19.476948] usb 1-1: Manufacturer: LG ELECTRONICSInc > [ 19.646303] cdc_acm 1-1:1.2: ttyACM0: USB ACM device > [ 19.726490] usbcore: registered new interface driver cdc_acm > [ 19.743535] cdc_acm: v0.26:USB Abstract Control Model driver for USB modems > and ISDN adapters > [ 19.826110] cdc_ether 1-1:1.0: wwan0: register 'cdc_ether' at > usb-0000:00:0f.5-1, Mobile Broadband Network Device, 64:99:5d:f7:c0:64 > > With it set back to 0, the driver is correctly registered: > > [ 19.667135] usb 1-1: Product: LG UDC-AHB Subsystem > [ 19.681527] usb 1-1: Manufacturer: LG ELECTRONICSInc > [ 19.908204] cdc_acm 1-1:1.2: ttyACM0: USB ACM device > [ 19.926913] usbcore: registered new interface driver cdc_acm > [ 19.943957] cdc_acm: v0.26:USB Abstract Control Model driver for USB modems > and ISDN adapters > [ 20.056480] usbcore: registered new interface driver cdc_ether > [ 20.142189] lg-vl600 1-1:1.0: eth3: register 'lg-vl600' at > usb-0000:00:0f.5-1, LG VL600 modem, 64:99:5d:f7:c0:64 > > This regresses the fix to name the device wwanX instead of ethX, so there's > probably a better way of doing this. > > Let me know what other information may be useful. > -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
